<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>06_列表渲染_过滤与排序</title>
</head>
<body>
<!--
    1.列表过滤
    2.列表排序
-->

<div id="test">
    <input type="text" v-model="searchName"/>
    <ul>
        <li v-for="(p,index) in filterPersons" :key="index">
            {{index}}--{{p.name}}--{{p.age}}
        </li>
    </ul>

    <button @click="setOrderType(1)">年龄升序</button>
    <button @click="setOrderType(2)">年龄降序</button>
    <button @click="setOrderType(0)">原本顺序</button>
</div>

<script type="text/javascript" src="js/vue.js" ></script>
<script>
    new Vue({
        el: '#test',
        data:{
            persons:[
                {name:'Tom',age:18},
                {name:'Jack',age:16},
                {name:'Bob',age:19},
                {name:'Rose',age:17}
            ],
            searchName:'',
            orderType: 0,    //0代表原本，1代表升序，2代表降序
        },
        computed:{
            filterPersons(){
                //取出相关数据
                const {searchName,persons,orderType}=this
                //最终需要显示的数组
                let fPersons;
                //对persons进行过滤
                fPersons=persons.filter(p=> p.name.indexOf(searchName)!==-1)

                //排序
                if(orderType!==0){
                    fPersons.sort(function(p1,p2){    //返回负数P1在前，返回正数P2在前
                        //1代表升序，2代表降序
                        if(orderType===2){
                            return p2.age-p1.age
                        }else{
                            return p1.age-p2.age
                        }
                        return p2.age-p1.age
                    })
                }

                return fPersons
            }
        },
        methods:{
            setOrderType(orderType){
                this.orderType=orderType
            }
        }
    })
</script>
</body>
</html>